Trip hook



R. N. LYON TRIP HOOK Dec. 10, 1929.

Filed Jan. l3, 1928 Patented Dec. 10, 1929 ROBERT N. LYON, F coEUn DALENE, IDAHO, assrenon or ONE-HALF mo mama w.

LAWSON, 0F conun DALENE, IDAHO TRIP noon 7 Application filed January 13, 1928. Serial No. 246,632.

This invention relates to new .and useful improvements in trip hooks.

One object of the invention is to provide a trip hook of novel and simple construction, which is particularly adapted for releasing a trip chain, which is under a heavy load or strain.

Another object is to provide a device of this character which will effectively hold the chain against movement under normal working conditions, but which can be quickly and easily released to free the chain.

Another object is to provide, in a hook of this character, a detent which, when released, will swing outwardly, away from the hook,

whereby to more efiectively permit the chain to become separated from the hook.

Other objects and advantages will be apparent from the following description when taken in connection with the accompanying drawing.

In the drawing:

Figure 1 is an elevation of a trip hook made in accordance with the present invention.

Figure 2 is a plan view of the same.

Figure 3 is a vertical longitudinal sectional view on the line 33 of Figure 2.

Figure 4 is a longitudinal sectional view on the line 44 of Figure 1.

Referring particularly to the accompanying drawing, there is shown a hook 1O having an opening 11 in the bill thereof, said opening extending longitudinally of the major axis of the hook. In the inner portion, of shank 12, of the hook, there is formed a bifurcation 18, and disposed in said bifurcation is the inner end of the detent member 14. This detent member 14 is formed with a longitudinal slot 15, and disposed through the sides of the bifurcation, and through said slot, is a pivot pin 16, which permits the detent to slide longitudinally of the hook, and to swing toward and away therefrom. The free end of the detent is reduced in diameter, as shown at 14, for passage into the opening 11, of the bill of the hook, the inner face of the said free end of the detent being beveled, as at 17, whereby to permit the same to readily snap into said opening. Within the bifurcation of the shank of the hook there pin in the recess, a detent having a nose en is secured one end of a spring 18, the other end of said spring being connected with the adjacent end of the detent member 14, and normally urging said member in the direction of the opening 11, of the bill of the hook. Connected to the outer end portion of the detent member 14 is one end of the trip chain 19, which, when pulled by the operator, will slide the detent member inwardly, against the action of the spring 18, whereby to with p draw'the free end of the detent from theopening 11, whereupon the detent will swing outwardly from the hook, and permit the chain 20 to free itself from the hook. To restore the detent to chain holding position, the operator simply swings the detent in wardly and presses the free end until it snaps into the opening 11, whereupon the spring 18 will retain the detent thus engaged in the opening, while the chain 20 will be held within the hook. 3

Should it be desired to prevent the detent 14 from being accidentally released from its engagement with the bill of the hook, a pin or other suitable device may be inserted through the exposed portion of the slot 15, whereupon the detent cannot be moved suificiently far to disengage its outer end from the hook. A piece of wire, a nail, or a cotter pin may be used for this purpose, as will be clearly understood.

What is claimed is; V

1. A trip hook including a body having a bifurcation and a. bill having an opening, a detent having a slot in'one end and said end disposed within said bifurcation, a pin disposed through the sides of the bifurcation and through said slot whereby the detent is slidable longitudinally of the hook into and out of said opening, and pivotally movable toward and away from the bill of the hook the other end of the detent being engaged 7 in said opening, and a spring in the bifurcationengaged with the detent for yieldably maintaining the latter in said opening.

2. A trip hook including a body havinga bill formed with an opening, the other end of the hook having a recess, a transverse gaged in said opening and having a slotted end disposed in the recess with said pin arranged in the slot thereof, said body and detent being arranged to confine links of a chain therebetween, a flexible arm mounted in the recess and having its outer end connected with the slotted end of the detent, and

' I a flexible element connected with the detent for withdrawing the detent from the opening of the bill whereby to-permit the said flexible element to swing the detent outwardly from the bill.

ROBERT LYON.

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